Apparatus for feeding fine fuel.



No. 660,458. A Patented ocf za, I900.

H. B. PRUDEN. I

APPARATUS FOR FEEDING FINE F UE'L.

' (Applicatiqn-fllad am 27, 1900. (No Model.)

I WITNEv I d ATTORNEYS.

Lil

UNITED STATES PATENT OFFICE.

HARRY l3. PRUDEN, OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOR FEEDING FINE FUEL.

SPEClFICATION forming part of Letters Patent No. 660,458. dated October23, 1900.

Anplication filed January 27. 1900. Serial No. 2,987. .No model.)

To all whom, it ntay concern:

Be it known that I, HARRY B. PRUDEN, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania,have invented certain new and useful Improvements inApparatus for Feeding Fine Fuel, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to an apparatus for feeding pulverized, granular,or other finefuel to furnaces.

One object of my invention is to provide improved means for feedingcoal-dust or other granulated or powdered fuel; and to this end myinvention consists in the apparatus as hereinafter specified.

My invention has for its further object to provide an apparatus whereinthe powdered coal-dust is automatically fed into a receptacle, saidreceptacle being provided with airpipes having a high pressure and beingarranged in such a manner as to cause a cyclone within said receptacleand forcing the coaldust downwardly through the discharge-pipe into abell-shaped mouth leading into the furnace.

The invention finally consists in the novel construction, combination,and arrangement of parts to be hereinafter more fully described, andspecifically pointed out in the claims.

In describing the invention in detail reference is had to theaccompanying drawings, forming apart of this specification,and whereinlike numerals of reference indicate corresponding parts throughout theseveral views, in which- Figure 1 is a vertical sectional view of myimproved apparatus, showing the same attached to a furnace. Fig. 2 is adetail view of the end of the discharge-pipe leading into the furnace.Fig. is a front view of the same. Fig. 4 is a horizontal sectional viewof the egg-shaped receptacle. Fig. 5 is a top plan view thereof.

Referring to the drawings by reference-numerals, 1 indicates anegg-shaped receptacle, which is preferably constructed of two parts andsuit-ably secured together by means of bolts 2, passing through annularflanges 3, arranged on the upper and lower sections of the receptacle.

The reference-numerals 4 and 4 represent air-supply pipes leading intothe receptacle 1, the pipe at being shorter than the pipe 4;, as shownin Fig. 5, for the purpose as will be hereinafter described.Deflectingplates 5 are arranged in the interior of the receptacle andare in close proximity to the mouth of the air pipes.

The reference-numeral 6 indicates a supply-pipe having arranged thereina slide or valve 7, designed to regulate the feed to the receptacle, theupper end of said supply-pipe being provided with a hopper 8. Chains 9are fastened to apertured lugs 10, rigidly secured to the outer casingof the receptacle, the other ends of the chains being suitably fastenedto any support. These chains serve to support the receptacle and retainthe same in proper position.

The referenceuiumeral 11 indicates a discharge-pipe communicating withthe eggshaped receptacle at its base.

The reference-numeral 12 represents a bellmouth extension of thedischarge-pipe leading into the furnace 13 and communicating with thecombustion-chamber 14 of the furnace.

The operation of my improved apparatus and process is as follows: Thepulverized or granulated fuel is fed into the hopper in any suitablemanner and the discharge thereof regulated bythe slide or valve leadinginto the egg-shaped receptacle, thereby regulating the feed to the sameand causing the fuel to be fed by gravity. When the latter enters theegg-shaped receptacle, the air-pressure of the air-supply pipes 4-.andft will cause the fuel to spirally rotate in said egg-shapedreceptacle, as the air from the pipe 4 is deflected toward the innerface of the receptacle and the air from the pipe at is also deflectedtoward the inner face of the receptacle in the same path of travel, asindicated by the arrows in Fig. 4 of the drawings, thoroughlycommingling the fuel with the air before the same is fed to the furnaceto increase the combustion.

The herein-described apparatus is particularly adapted for boiler use,and a more intense heat is produced than by the present methods, and,furthermore, a great saving of fuel is effected in this manner.

It Will be noted that various changes may be made in the details ofconstruction of my improved apparatus without departing from the generalspirit of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination with the combustionchamber, of an egg-shapedreceptacle, chains connected to said receptacle and to a suitablesupport, air-supply pipes connected to said receptacle at differentsides thereof, deflecting-plates secured to the inner face of thereceptacle at the discharge of each of said pipes for projecting the airfrom each pipe in the same path of travel Within the receptacle, afeed-pipe having a hopper mounted on said receptacle, a feed-regulatingvalve in said feed-pipe, and a discharge-pipe connected at its one endto the receptacle and at its other end provided With a bell-shaped mouthcommunicating with the combustion-chamber, substantially as described.

2. The combination with the combustionchamber, of a receptacle, chainsconnected to said receptacle for supporting the same,a

feed-pipe provided With a hopper for feeding fine fuel to saidreceptacle, a controlling-valve arranged in said feed-pipe,air-supplypipes connected to said receptacle at different sides thereof and to acommon course of air-supply, deflecting-plates arranged within thereceptacle at the discharge of each of said airsupply pipes and adaptedto project the air from each of said pipes in a common path of travel,and a discharge-pipe connected at its one end to said receptacle and atits other end terminating in a bell-shaped mouth communicating with thecombustion-chamber, substantially as described.

In testimony whereof I affix my signature in the presence of twowitnesses.

HARRY B. PRUDEN.

Witnesses:

JOHN NoLAND, E. W. ARTHUR.

